Without nutes, the plant will mature and everything (as far as I know), but it certainly won't be high quality or good yield. Proper nutrients and lighting are the best investments you can make, and they are very much worthwhile in the end. I figure, if you're not gonna put the time and effort (and a little bit of money) into growing, then why bother to do it at all?

Again, I highly suggest reading the Cannabis Grow Bible. It's the quickest way to learn everything you need to know.